Projects per year
Abstract
Swelling pressure of expansive soil is a fundamental parameter in the prediction of expansive soil behavior and also an essential quality indicator for geotechnical structure design. In this paper, we proposed a novel method by combining the diffuse double layer theory and molecular dynamics approach to predicting swelling pressure of expansive soil. The molecular structure was constructed based on the Na (Ca)-montmorillonite clay, which is the main mineral composition related to the swelling of expansive soil. The effects of electrical potential energy and van der Waals' energy were considered in this model. The proposed model was validated by comparing the predicted swelling pressure with the experiment results under different cation exchange capacities and dry density conditions. The capability of the model was discussed for different montmorillonite contents and interlayer cations. Two swelling pressure versus dry density graphs for montmorillonite with monovalent and divalent interlayer cations were developed for engineering application. The model calculated swelling pressures agreed well with the experimental results. This model provides a solid but cost-effective way to predict swelling pressure.
Original language | English |
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Article number | 105998 |
Number of pages | 12 |
Journal | Applied Clay Science |
Volume | 203 |
DOIs | |
Publication status | Published - 15 Mar 2021 |
Keywords
- Cation exchange capacity
- Diffuse double layer
- Dry density
- Expansive soil
- Molecular dynamics
- Swelling pressure
Projects
- 3 Finished
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SPARC - Collaboration with Monash City Council
Kodikara, J. (Primary Chief Investigator (PCI)), Xu, B. (Partner Investigator (PI)) & Sounthararajah, A. (Project Manager)
1/07/19 → 30/06/23
Project: Research
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SPARC - Collaboration with TGVK Pty Ltd
Kodikara, J. (Primary Chief Investigator (PCI)), Thirugnanasundralingam, K. (Partner Investigator (PI)) & Sounthararajah, A. (Project Manager)
1/07/19 → 30/06/24
Project: Research
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SPARC - Collboration with AustStab Lmited
Kodikara, J. (Primary Chief Investigator (PCI)), Dack, S. (Partner Investigator (PI)) & Sounthararajah, A. (Project Manager)
1/07/19 → 30/06/23
Project: Research